Printing of films



March 2l, 1933. C, D CHASE 1,902,277

PRINTING OF FILMS Filed July 9, 1930 Patented Mar. 21, 1933 Ummm;osmosi;

ramTrim-folfFIvLMerl This invention zrelates to. printing Aofiiilms.having utilityinffd-iscv camera ,and pr.o]ectorv apparatus.

Disc film;v as described .in .my copendingv 5eapplication,A SerialNo.`466,815, filed .July 9,

1930, ,for-disc. cameras and projectors, consistsfof a circulardiscftra-nsparency vadapted v tocarry a. seriesfof pictures or imagesrecondedsiny sequence 4along a spiral or helixy In practice, a serieskof picker slots iis punched simultaneously by 'means of a punching die,of which the individual 25punches are designedy itot `belspaced .apartan equal angular-distance. However, it has-been Afound.fdifcultvtoobtain ythis .desired accuf v rate-.spacing offthepunches and thereforethe slots, @due toV .imperfect spacing jof the -indi- Y 301vidualpunches, are'unequallyrspaced; Since;y every image orfexposureofthe` radial,V rows: and consequentlyo-:E thef pictureseries y bears l aLdeini-te relation toanfindividual slot'whichl causes thatimage to-be-made-on the film, it

35will be seen thatfwhere-theslots-areunequal-- lyspaced from eachothery and `a-positivefilm prin-ted from a negativefhaving the notedimperfections, the: positive -record vis 'generally f not accuratelymatched withlthenegativerec-l lord. Consequently, an imageofthe-positive record may fail fto bear awtrue Vangular-.-relationftoits picker slotyfand yflickeringof the.

projected picture results.

rItis accordingly an .obj ect-y of my inven- 45`ti'on to preciselymatchthe positive-and negative record withregardto the picker slots, in such`man-nerfthat the picker slots ofeachwhich 1 have beenwpunched by thefsamef in-` dividual punch.v of thev punching: diea-re in 5 absoluteregistry. l

A furth'erlobject. is toprovideameansand f v method of definitelymatching sposi-tive with.-v

a ,negative ilm, A,duringthe.,prln ting i of the positive `film from@thenegativee Other .objects will ben .pant obvious front maar.

theannexed drawing-and in part hereinafter? indicated in. connectiontherewith by t1;xef o1=v f lowingv analysis of thisv invention.

This inventionaccordingly,,consistsfin the features of construction.,Acombination voften parts and in the unique relationeel? ,then membersand tink ,ther relative proporftioningfand disposition i thereof,.allflas smore/700mg;lately-;- outlined herein?.

To enable others skilled `in the art ,tofully.,655.11

comprehend th/e1,underlyingk features-thereof? merousfmodi cationsfin-gstructureande relae tioncontemplated by th-is'inveniiionmsdrawng-f; adepicting, apr-cierred sforln fof EtheinventionA,7 0a:

has beemannexedas a-lp'artfof` thizsvdiscld` sure, and iin:v such:dmwsf.i1ag.,likefcharacl ters of reference denote corresponding partsmeans ,fompositively and accuratelyfmatchfg ingtheppsiti-vefwith.anegative reooafdr flaringJ` printingof the ppsitivefrecordf;

F ig. 2 is a section through.impr ;0ed'-prnting-fframelw-ithfthegparts-maintainedvin fof@ s, printinggrelationf;Y

Fig. 3` isa partial perspective viewvwhiehij; shows L diagrammaticallymypimproved :far-l', 1 rangementfof raccuratelylmatehingia: positive:`with a negative film for printingpurposesf,

,In-the 1drawing,and referringfirst to Eig.3the,reference-icharaeterfl() mayadsignate-aa negativedisc. film1pro'vidr'eelf with aaseries of y peripheral piokerislots, of which anytwo-ade. jacent slots are indicated at 10a, 106. Simi-1 90 larly, `thereferencecharactem ll mayaiesignate apositive ilm--ontransparencyprovided with aulikxeseries of `'picker-:slotsutwo'adjacent -fslotswbeing indicated, zat llas 11b;-A It will be understood ftha-t 5the seriesV ofi slots; inclusive 95 ofslots '10a,l0b-,'have1beenoformed1in thegdisc 10Q-by a series cof individual; punches'. 0f x a punchingdie.A Inordel? tu secure ari-absolute matching of -theffilrne ,1Q`swithfxtlrne,I Vflm 11, I

manner that the picker slots 11a, 1lb, which have been punched by thesame individual punches of the same die punch forming the slots 10a,10b, are in registry with said slots 10a, 10b. ferred from the negativel10 to the positive ll bears exactly the saine relation to the slots 11a,11b, as the corresponding images of the negative l0 bear to the slots10a, 10?).

l/Vhere the peripheral slots Vof the disc 10 have been punched with theemulsion or sensitizing surface thereof facing downwardly, the disc 11will be punched with its emulsion or sensitizing surface facingupwardly, this by reason of the fact that during printing, the emulsionsurface of the respective films are in facing relation. l

In order to 'permit a printing operator, to definitely match thenegative and positive films 10, l1, respectively, as above'described, I

' also punch in each of the films 10, 11' a match-v ing hole 12a, 12b,with a'punch bearing a definite relation'to the individual punches whichhave, for instance, punched the picker ape-rtures 10a and 10b oftheviecord l() and the slots 11a and 11b of the film record 1l.

Referring now to my improved printing frame, the reference character 2()describesv a base section of the frame which lmay be of a solid panelhavingA an undercut edge 2l throughout. Hinged to the base section 2O isa panel frame 22providing amounting for a glass vpanel 23. By referenceto Fig. 2, When'the hinged section is brought down on the base section20, the lower surfaces of the frame'22 are prevented from bearing on thebse by reason of the undercut edge 21 there- O, Y

The base'20 is provided'with a centering pin 25 which may be screwed orotherwise secured therein to provide a rigid mounting, and its operativeupper face is covered with a y pad 26 which may be vof felt or othersoft cushioning material. Y f

Spaced from the centering pin 25, I provide a matching pin 27, which maybe disposed along any radius of the films to be printed, but, ispreferably spaced from the center pin 25 on a radiusof the films beyondthevpi'cture record thereon. 1 A i The glass panel 23 is provided withopenings 28 and 30 through which the said pins 25 and 27 extend when thehinged section 22 is M brought into engagement with the base sec- 'tion20. 1

l provide means for holding the sections 20, 22 in tight engagingrelation, and such means may include an indentation Bl'in the base sec-vtion 20 into which a spring detent 32 carried by the hinged framesection 22 engages. The spring` detent thus acts to lock the frame 22and glass panel 23 into tight engagement with the films centered on the-pin 25.

In use, an operator may openthe frame to Y the Vposition of Fig. l andmount the positive Consequently, the image trans-Y ing is rotatednntilits matching aperture 12a` is` aligned with the Vmatching pin 27.Thereupon, thefilm 10 is forced downwardly into engagement with thepositive 11, and neces sarily in 'such manner that each of the pickerslots of one film is absolutely matched with each of the picker slots ofthe other -film n which have been punched by the same individual punchesof the punching die. Consequently, everyimagertransferred to thepositive 11 bearsy the sainey identical relation to the picker slotbringing it` into vview as the corresponding image exposure of thenegative bears to the particular picker slot thereof which has causedthat exposure to be phot0' graphed. Obviously, when the positive is usedfor projection purposes, flickering of the projected picture resultingfrom the incorrect spacing of an image of the series from Y itsindividual picker sot is eliminated. Y

It will thus be seen that the several objectsv of the `invention areachieved and `other ad-y vantageous results are obtained.

As many changes could be made in carrying out the above invention,without departing from the scope thereof, it is intended that all mattercontained in theabove description orl shown` in the accompanying drawingshall be interpretedl as 'illustrative and not in a limitsense; 7 g fWithout further analysis, the foregoing will so fully reveal the gist'of this invention that others can by applying current'J knowi-` edgereadilyv adapt it for various applications Y without omitting certainfeatures that from Vthe standpoint of the prior art, fairlyconstituteessential characteristics of the generic or specific aspects of thisinvention, andV t-heref` fore such adaptations should and are intendedto he comprehended within the meaning and range of equivalency of thefollowing claims. l. A printing frame comprising a base sec. tion, apanel operatively related thereto,.and

a centering pin extending from the'base section for Ycentering discfilms relative to each other, the panel being provided with a holethruwhich the centering pin extends when the section and panel aredisposed in pri1iting relation. e

2. A printing frame comprisinga base scction, a panel operativelyrelated thereto, and a centering pin extending from the base sec# tionfor centering 'disc films relative to each other, a. matching pinextending from said section and cooperating with matching aper- 'turesin the film, the panel being provided with holes thru which said pinsextend when the section and panel are disposed in printing relation.

In a disc film printing assembly adapted to receive a negative and apositive film, each of said films being provided with a series of slotsdisposed about its periphery, each of said slots of both series beingcut by individual punches of a series of punches, a base section onwhich one of said films is disposed, means to center the other film onsaid section with respect to the first-named film, a panel opertaivelyrelated to said base section, and means to match said films in centeredrelation so that the individual slots of each which Were punched by thesame individual punches of the punch series are in registry.

4. In a disc film printing assembly adapted to receive a negative and apositive film, each of said films being provided with a series of slotsdisposed about its periphery, each of said slots of both series beingcut by individual punches of a series of punches, said films each havinga matching hole definitely related to a slot which has been punched bythe same punch of the punch series, means to center said films on saidbase section relative to each other, a matching pin on said base sectionpermitting and causing matching of the centered films so that theindividual slots of each which were punched by the same individualpunches of the punch series are in registry, and a panel operativelyrelated to said base section.

5. The method of matching a positive with a negative film for printingof the positive, each of said films having a series of peripherallydisposed slots formed therein by a plurality of individual formingmeans, which consists in centering said films in transfer relation, anddisposing one of said films relative to the other in such manner that aslot of its series is in registry with a slot of the other series formedby the same individual forming means.

6. The method of matching a positive with a negative film for printingof the positive, each of said films having a series of peripherallydisposed slots formed therein by a plurality of individual formingmeans, which consists in centering said films in transfer relation, anddisposing one of said films relative to the other in such manner thatthe slots of its series are in registry with the slots of the series ofthe other film which have been formed by the identical forming means.

7. The method of matching a positive disc film with a negative disc filmfor printing of the former, which consists in providing a series ofpicker slots in each with slot forming means individual to each slot ofboth series, and arranging one of said films in. transfer relation insuch manner that the `slots of each Series whichv were formed. by

the same individual forming means are in registry.

8. The method of matching a positive disc film with a negative disc filmfor printing of the former, which consists in providing in one film aseries of picker slots with slot forming means individual to each slot,providing in the other film a like series of picker slots with the sameslot forming means, disposing said films with their emulsion surfaces infacing relation, and arranging said films so that the slots of eachseries which were formed by the same individual slot forming means arein registry.

Signed at Washington, District of Columbia, this 18th day of April,1930.

CURTIS D. CHASE.

